370 THE EVOLUTION OF OUR NATIVE FRUITS 



Bubus villosus, but strangely enough, although the common black- 

 berry, it now has no scientific name. I, therefore, propose to call 

 it Bubus nigrobaccus (p. 379). (2) The leafy-cluster type of black- 

 berry, which is characterized by a stiffer and mostly shorter 

 growth, by smaller and usually narrower leaves, short and leafy 

 flower-clusters, and the general, although not complete, iibsence 

 of villousness (Figs. 64, 65, 90). This plant must now receive the 

 name Bubus argutus, Link, and its synonyms are Bubus frondosus, 

 Bigelow, and Bubus suberectus, Hooker. A very large -flowered, 

 short -clustered and blunt-leaved type of this is the plant which 

 Trattinnick described as Bubus floridus, and which I now propose 

 to designate as Bubus argutus var. floridus. (3) The thornless 

 blackberry type (Figs. 92, 93 \ which must now be called Bubus 

 Canadensis, a synonym of which is Bubus Millspaughii. 



Another form of the high-bush blackberry is a plant which 

 Porter has named Bubus Allegheniensis, or the mountain black- 

 berry. I have not had opportunity to examine this plant in its 

 native state. The herbarium specimens do not always seem to 

 be distinct enough to warrant the separation of the plant from 

 the common high-bush blackberry, but since Professor Porter 

 has studied the plant in its native state for many years, and 

 insists in several publications upon its distinctness, I shall accept 

 it as a distinct species (p. 381). I am the more inclined to this 

 opinion since if the common high-bush blackberry were to be 

 united with the mountain blackberry, Bubus Allegheniensis would 

 have to be taken as the type of the species; and I should consider 

 it unfortunate to take a mountain form as the type of a common 

 continental plant. This arrangement gives an analytical and 

 perspicuous treatment to the high-bush blackberries, and should 

 .be the means of making the various forms better known. It 

 goes without saying that in plants which are so confused as 

 rubi, intermediate and perplexing forms will be found; but even 

 these forms can be best understood when the plants are broken 

 up into their reigning types. 



Coming to the dewberries, we find ourselves in new trouble. 

 In the first place, as we have seen, the common dewberry 

 of the North must be Bubus villosus and not Bubus Cana- 

 densis. This dewberry includes two or three distinct forms, 

 two of which I propose to separate at once as distinct species. 



